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Policy Solution

Green walls

Lead by Example

Case Studies

Summary

Green walls are composed of plants installed on the sides of buildings. The plants cool buildings envelope temperatures and surrounding temperatures through evapotranspiration and shading. Green walls are also known as living walls or vertical gardens.

Implementation

Promote green walls by converting or installing them on existing or new publicly-owned property.

Considerations for Use

Green walls require sufficient irrigation and high levels of ongoing maintenance. Plants should be selected that provide dense foliage to maximize coverage.

Overview

  • Climate:

    Hot/Humid, Temperate

  • Policy Levers:

    Lead by ExampleGovernments have ownership and jurisdiction over a range of assets (e.g. buildings and streets) and also serve as a direct employer, and contractor. This allows them to promote heat risk reduction and preparedness solutions and demonstrate their impact through leading by example with proactive interventions to make their assets, employment opportunities, and contracts heat-resilient.

  • Trigger Points:

    Evaluating or initiating major city infrastructure projectsIncludes projects such as city transit, street or utilities construction / re-construction etc.
    Planned new developmentIncludes Greenfield or brownfield development or new construction
    Substantial rehabilitationIncludes the re-development or major renovation projects.

  • Intervention Types:

    Green/natural Infrastructure

  • Sectors:

    Buildings

Case Studies

Impact

  • Target Beneficiaries:

    Residents

  • Phase of Impact:

    Risk reduction and mitigation

  • Metrics:

    Decrease in building temperature, Energy savings, Number of installations completed and in progress projects, Stormwater runoff reduction

Implementation

  • Intervention Scale:

    Building

  • Authority and Governance:

    City government

  • Implementation Timeline:

    Medium-term (3-9 Years)

  • Implementation Stakeholders:

    City government

  • Funding Sources:

    Public investment

  • Capacity to Act:

    High, Medium

Benefits

  • Cost-Benefit:

    High

  • Public Good:

    Medium

  • GHG Reduction:

    Medium

  • Co-benefits (Climate/Environmental):

    Improve stormwater management, Preserve biodiversity, Reduce air and water pollution

  • Co-benefits (Social/Economic):

    Build social cohesion, Improve human health, Increase property values, Save on utilities